SAN FRANCISCO, CA - SEPTEMBER 01: Black smoke billows from a chimney on top of the Russian consulate on September 1, 2017 in San Francisco, California. In response to a Russian government demand for the United States to cut its diplomatic staff in Russia by 455, the Trump administration ordered the closure of three consular offices in the San Francisco, New York and Washington. (Photo by Justin Sullivan/Getty Images)(Photo: Justin Sullivan, 2017 Getty Images)

SAN FRANCISCO (AP) — Acrid, black smoke was seen pouring from a chimney at the Russian consulate in San Francisco Friday, a day after the Trump administration ordered its closure amid escalating tensions between the United States and Russia.

Firefighters who arrived at the scene were turned away by consulate officials who came from inside the building. An Associated Press reporter heard people who came from inside the building tell firefighters that there was no problem and that consulate staff were burning unidentified items in a fireplace.

Mindy Talamadge, a spokeswoman from the San Francisco Fire Department, said the department received a call about the smoke and sent a crew to investigate but determined the smoke was coming from the chimney. "They had a fire going in their fireplace," she said.

Talmadge said she did not know what they were burning on a day when normally cool San Francisco temperatures had already climbed to 95 degrees by noon.

"It was not unintentional. They were burning something in their fireplace," she said.

The consulate's workers are hurrying to shut Russia's oldest consulate in the U.S.

The order for Russia to vacate the consulate and an official diplomatic residence in San Francisco — home to a longstanding community of Russian emigres and technology workers — escalated an already tense diplomatic standoff between Washington and Moscow.

The deadline for the consulate to close is Saturday. ___ Associated Press writer Jocelyn Gecker contributed to this report.